The key to this problem is to control the amount of rescuing material and keep it in a rational degree. Subsequently, this reasonable system will exert better function.
问题的关键是控制救援物资的数量，使它们保持在合理的范围内，这一合理制度才能更好地发挥作用。
Urban stormwater management system with rational structure and function is necessary to improve management effectiveness, reduce the error in decision and lower the impact of urban stormwater.
结构和功能合理的城市暴雨雨水管理系统对提高管理效率、降低决策中的人为失误、减少城市暴雨雨水的影响有着重要作用。
So the author thinks that Mulan Boxing, a middle intensity sports, only makes rational use of exercising volume, and effectively promotes the middle and old person's cardiovascular system function.
因此作者认为，木兰拳是一种中等强度运动，合理控制运动量，坚持锻练，能够有效提高中老年心血管系统机能。
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